Stimulus novelty and intraseries primacy in GSR adaptation

GSR records were obtained for four groups of 20 Ss. Group I was presented with a series of four different lights (amber, blue, green, and white) appearing 20 times each, in apparent random order. The procedure was similar for the other three groups except that in group 2, a novel stimulus (a red light) appeared instead of the sixth amber light; in group 3, it appeared instead of the 11th amber light; and, in group 4, it appeared instead of the 16th amber light. Typical GSR adaptation phenomena were observed in all groups. The introduction of the novel stimulus appeared to have no effect on the course of GSR adaptation.     

Test-retest reliability of the relative work centrality measure

The Meaning of Work International Research Team in 1987 developed the Relative Work Centrality measure, on which individuals divide 100 points among five major domains (work, leisure, community, religion, and family) in their lives, based on their relative centrality. The present study examined the test-retest reliability of this measure in a convenience sample of 96 Israeli full-time workers over a 4-wk. period. The sample consisted of 41.7% men and 58.3% women, of whom 48.9% were married. The participants had a mean age of 36.0 yr. (SD = 11.5) and a mean education of 14.9 yr. (SD = 2.5). The Spearman rank correlation coefficients for work, leisure, community, religion, and family at Time 1 and Time 2 were, respectively, .66, .76, .64, .76, and .82. These values indicate a fairly high test-retest reliability of the Relative Work Centrality measure and support the notion that this measure can also be applied to assess the relative centrality of each of the other four major life domains, in addition to work.     

Filling of the Circle of Willis in carotid angiography using halothane anesthesia

A comparative study of 150 carotid angiographies carried out under local anaesthesia and the same number under halothane anaesthesia did not show any great deviation from the well-known filling rates of the counter-lateral carotid region and the ipsilateral A. cerebri posterior nor any striking differences in the two methods of anaesthesia which could convince of a favourable influence of halothane on the demonstration of the vessels. The causative factors of the filling of adjacent vascularisation regions can certainly only be explained from the complex co-action of physiological and any external factors in cerebral angiography.     

Rationality of belief or: why savage’s axioms are neither necessary nor sufficient for rationality

Economic theory reduces the concept of rationality to internal consistency. As far as beliefs are concerned, rationality is equated with having a prior belief over a ??Grand State Space??, describing all possible sources of uncertainties. We argue that this notion is too weak in some senses and too strong in others. It is too weak because it does not distinguish between rational and irrational beliefs. Relatedly, the Bayesian approach, when applied to the Grand State Space, is inherently incapable of describing the formation of prior beliefs. On the other hand, this notion of rationality is too strong because there are many situations in which there is not sufficient information for an individual to generate a Bayesian prior. It follows that the Bayesian approach is neither sufficient not necessary for the rationality of beliefs.     

An improved apparatus for the aversive conditioning of cigarette smokers

An apparatus is described which permits the presentation of an aversive stimulus (smoke) and a reinforcing stimulus (fresh air) in such a way that it is possible to control their respective latencies and durations. Verbal stimuli may also be presented conjointly with the aversive and reinforcing stimuli. This apparatus was designed to overcome the shortcomings in previous investigations by permitting a more systematic approach to the study of the factors relevant to successful behaviour therapy with addicted smokers. Nine subjects completed a course of aversive conditioning and four were found to be totally abstinent after 6 months follow-up. The weaknesses of the present technique are pointed out and possible improvements briefly noted. In particular, a “broad spectrum” behavioural approach to smoking is advocated.     

The effect of change in sequential visual stimuli on GSR adaptation: II,the novel stimulus as a disinhibiting stimulus

GSR records were obtained for 20 Ss presented with a series of 80 stimuli (four lights alternating in apparent random sequence). Records were obtained, also, for 20 Ss in each of two groups, using the same procedure: in Group 1, a tone was substituted for one of the lights, early in the sequence, and in Group 2, it was substituted later in the sequence. The tone, the novel stimulus, produced significant changes in the GSR adaptation patterns of the two groups.     

Reducing the Effects of Stereotype Threat on African American College Students by Shaping Theories of Intelligence

African American college students tend to obtain lower grades than their White counterparts, even when they enter college with equivalent test scores. Past research suggests that negative stereotypes impugning Black students' intellectual abilities play a role in this underperformance. Awareness of these stereotypes can psychologically threaten African Americans, a phenomenon known as “stereotype threat” (Steele & Aronson, 1995), which can in turn provoke responses that impair both academic performance and psychological engagement with academics. An experiment was performed to test a method of helping students resist these responses to stereotype threat. Specifically, students in the experimental condition of the experiment were encouraged to see intelligence—the object of the stereotype—as a malleable rather than fixed capacity. This mind-set was predicted to make students' performances less vulnerable to stereotype threat and help them maintain their psychological engagement with academics, both of which could help boost their college grades. Results were consistent with predictions. The African American students (and, to some degree, the White students) encouraged to view intelligence as malleable reported greater enjoyment of the academic process, greater academic engagement, and obtained higher grade point averages than their counterparts in two control groups.